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Entdoc Befor you screw up this rear, get a book that will show you how to set it up. When butting new pininion bearings in your rear there is a spacer of 20-26 thousands between the pininion face and the bearing. This should give you the correct depth. to set the pinion per load with a new crush collar tighten the large nut until the drag on the pinion nut is 25inch pounds. CHECK THIS WITH A TORQUE WRENCH. 1/4 inch drive. Get a dial indicator to check the backlash, you want with a posi from .005-.008 play. If you are going to beat on the car go with the tighter number. After you have the rear set up losen the pinion nut 1/2 turn, and retighten it to 20 inch pounds of drag with the torque wrench. Add fluid and additive to the posi if needed. Road test car, do figure 8's in a parking lot to get the fluid on the clutches in the rear. Figure 8's help the rear to loosen up when new. Put 500 miles on the rear and change the fluid break in is over, Light'em up. Good luck. If you have a problem call 732-254-3536 Rick Lake
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